This is actually something that I’ve been thinking about recently. I’m sure someone more qualified can answer your question on rarity better than me. I mentioned in another thread that although lots of people seem to like the deep set medallions I think my favorites stocks are the ones that have the flush medallions forward facing on both sides. I’m pretty sure this has been discussed here before. As far as I know they were only made that way for less than a year ca.1924 during the transition from hard rubber to walnut. Here’s our 1924 Police Positive Target in 32 New Police
May not be the scarcest but I certainly don’t see them often.
While we’re on the subject I’ll also say that I don’t understand where the name Fleur-de-lis comes from for the fancy ones you show. Isn’t this a Fleur-de-lis?
Lastly I’d like to know what models the stocks on top and bottom in the OP’s picture originally came on. I see them occasionally but can’t figure it out. All three are great by the way in my opinion.